Method begin

Kernel/include/list.h:474–484

	}

	ListIterator<T> begin() const {
		ListIterator<T> it;

		if(!num || !front){
			it.node = nullptr;
		} else {
			it.node = front;
		}

		return it;
	}
	
	ListIterator<T> end() const {
		ListIterator<T> it;